I'm thinking of making some animations to illustrate basic principles of electronics, electromagnetics, and the workings of circuits at all levels of sophistication. I may or may not have time to actually do any. Before i start, i'd like to take a quick survey on what concepts, laws of physics, and circuits people here at A.A.C. would be most interested in seeing animated? What ideas have never been clear to you from textbooks and online tutorials? What do you suppose would be just plain fun to watch?